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lib/livebook_web/live/user_helpers.ex
defmodule LivebookWeb.UserHelpers do
use Phoenix.Component
alias Livebook.Users.User
@doc """
Renders user avatar.
## Examples
<.user_avatar user={@user} class="h-20 w-20" text_class="text-3xl" />
"""
def user_avatar(assigns) do
assigns =
assigns
|> assign_new(:class, fn -> "w-full h-full" end)
|> assign_new(:text_class, fn -> "" end)
~H"""
<div class={"#{@class} rounded-full flex items-center justify-center"} style={"background-color: #{@user.hex_color}"}>
<div class={"#{@text_class} text-gray-100 font-semibold"}>
<%= avatar_text(@user.name) %>
</div>
</div>
"""
end
defp avatar_text(nil), do: "?"
defp avatar_text(name) do
name
|> String.split()
|> Enum.map(&String.at(&1, 0))
|> Enum.map(&String.upcase/1)
|> case do
[initial] -> initial
initials -> List.first(initials) <> List.last(initials)
end
end
@doc """
Builds `Livebook.Users.User` using information from
session and socket.
Uses `user_data` from socket `connect_params` as initial
attributes if the socket is connected. Otherwise uses
`user_data` from session.
"""
def build_current_user(session, socket) do
%{"current_user_id" => current_user_id} = session
connect_params = get_connect_params(socket) || %{}
user_data = connect_params["user_data"] || session["user_data"] || %{}
case User.change(%{User.new() | id: current_user_id}, user_data) do
{:ok, user} -> user
{:error, _errors, user} -> user
end
end
end